The Hidden Engineering of Wildlife Crossings
The Wallis Annenberg Wildlife Crossing, a $92 million project near Los Angeles, is the world's largest wildlife crossing of its kind. This article delves into the engineering behind these vital structures, addressing the challenges of habitat fragmentation, noise pollution, and wildlife-vehicle collisions caused by roads. It explores various design aspects, including site selection, crossing types (underpasses, overpasses, culverts), fencing strategies, and attracting animals to use the crossings. The article highlights the different crossing behaviors of various species and corresponding engineering solutions, such as elevated bridges for large animals and culverts for smaller ones. Design considerations include animal behavior, topography, vegetation, and ensuring the crossings blend seamlessly into the landscape, minimizing human-wildlife conflict.